Meet the Parkable: parking sensors you can easily attach to your car to park more conveniently. It is designed for older cars that don’t come with self-parking or park assistance features. The Parkable pairs with its companion app to provide you with a visual representation of your car parking with the distance to the obstacles. The system provides you with audio cues and vibrations to help you park.
The Parkable even works on trailers for boats and other vehicles. It is pretty easy to install as well. You can find out more about it on Indiegogo.